Finding the Fourth Proportional to 7,200.15, 10,807.56 and 6,919.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.15 : 10,807.56 = 6,919.98 : x
2. Step 2: Convert to fraction form
   7,200.15/10,807.56 = 6,919.98/x
3. Step 3: Cross multiply
   7,200.15x = 10,807.56 × 6,919.98
4. Step 4: Simplify right side
   7,200.15x = 74,788,099.05
5. Step 5: Solve for x
   x = 74,788,099.05/7,200.15
6. Step 6: Final answer
   x = 10,387.02